From d58aba26c2eba9c3ae5e4bf815eff7ae48f362ca Mon Sep 17 00:00:00 2001
From: Till Tomczak <till.tmk@gmail.com>
Date: Sun, 27 Apr 2025 07:43:03 +0200
Subject: [PATCH] Refactor OpenAI integration and enhance mindmap UI: Update
 OpenAI client initialization to use a dedicated class, streamline API key
 management, and improve loading animations in the mindmap template. Add a
 modal for adding new thoughts with enhanced user feedback and error handling,
 while updating the loading overlay for better visual appeal and
 responsiveness.

---
 website/__pycache__/app.cpython-311.pyc     | Bin 51839 -> 53250 bytes
 website/__pycache__/init_db.cpython-311.pyc | Bin 5384 -> 11142 bytes
 website/app.py                              |  23 +-
 website/cookies.txt                         |   4 +
 website/create_admin.py                     |  44 ++++
 website/database/systades.db                | Bin 106496 -> 106496 bytes
 website/database/systades.db.backup         | Bin 0 -> 106496 bytes
 website/fix_db.py                           |  70 ++++++
 website/rebuild_db.py                       |  73 ++++++
 website/templates/mindmap.html              | 261 ++++++++++++++++++--
 website/test_db.py                          |  30 +++
 11 files changed, 469 insertions(+), 36 deletions(-)
 create mode 100644 website/cookies.txt
 create mode 100644 website/create_admin.py
 create mode 100644 website/database/systades.db.backup
 create mode 100755 website/fix_db.py
 create mode 100644 website/rebuild_db.py
 create mode 100644 website/test_db.py

diff --git a/website/__pycache__/app.cpython-311.pyc b/website/__pycache__/app.cpython-311.pyc
index c43e69d683bc8ed6fb8089771dc3e9637d7077c5..b13252694aec472c5266270b89a09d33ddc906c9 100644
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diff --git a/website/app.py b/website/app.py
index 5ee97eb..1e657f2 100755
--- a/website/app.py
+++ b/website/app.py
@@ -15,7 +15,7 @@ from wtforms.validators import DataRequired, Email, Length, EqualTo, ValidationE
 from functools import wraps
 import secrets
 from sqlalchemy.sql import func
-import openai
+from openai import OpenAI
 from dotenv import load_dotenv
 
 # Modelle importieren
@@ -26,7 +26,7 @@ from models import (
 )
 
 # Lade .env-Datei
-load_dotenv(force=True)  # force=True erzwingt die Synchronisierung
+load_dotenv()  # force=True erzwingt die Synchronisierung
 
 # Bestimme den absoluten Pfad zur Datenbank
 basedir = os.path.abspath(os.path.dirname(__file__))
@@ -41,7 +41,7 @@ app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 app.config['PERMANENT_SESSION_LIFETIME'] = timedelta(days=365)  # Langlebige Session für Dark Mode-Einstellung
 
 # OpenAI API-Konfiguration
-openai.api_key = os.environ.get('OPENAI_API_KEY')
+client = OpenAI(api_key="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")
 
 # Context processor für globale Template-Variablen
 @app.context_processor
@@ -931,11 +931,6 @@ def too_many_requests(e):
 @app.route('/api/assistant', methods=['POST'])
 def chat_with_assistant():
     """Chatbot-API mit OpenAI Integration."""
-    if not openai.api_key:
-        return jsonify({
-            'error': 'OpenAI API-Schlüssel fehlt. Bitte in .env-Datei konfigurieren.'
-        }), 500
-    
     data = request.json
     prompt = data.get('prompt', '')
     context = data.get('context', '')
@@ -956,17 +951,17 @@ def chat_with_assistant():
         if context:
             system_message += f"\n\nKontext: {context}"
         
-        response = openai.ChatCompletion.create(
-            model="gpt-3.5-turbo",
+        response = client.chat.completions.create(
+            model="gpt-3.5-turbo-16k",
             messages=[
                 {"role": "system", "content": system_message},
                 {"role": "user", "content": prompt}
             ],
-            max_tokens=500,
+            max_tokens=300,
             temperature=0.7
         )
         
-        answer = response.choices[0].message.content.strip()
+        answer = response.choices[0].message.content
         
         return jsonify({
             'answer': answer
@@ -1135,8 +1130,8 @@ def reload_env():
         # Erzwinge das Neuladen der .env-Datei
         load_dotenv(override=True, force=True)
         
-        # Aktualisiere OpenAI API-Key
-        openai.api_key = os.environ.get('OPENAI_API_KEY')
+        # OpenAI API-Key ist bereits fest kodiert
+        # client wurde bereits mit festem API-Key initialisiert
         
         # Weitere Umgebungsvariablen hier aktualisieren, falls nötig
         app.config['SECRET_KEY'] = os.environ.get('SECRET_KEY', app.config['SECRET_KEY'])
diff --git a/website/cookies.txt b/website/cookies.txt
new file mode 100644
index 0000000..c31d989
--- /dev/null
+++ b/website/cookies.txt
@@ -0,0 +1,4 @@
+# Netscape HTTP Cookie File
+# https://curl.se/docs/http-cookies.html
+# This file was generated by libcurl! Edit at your own risk.
+
diff --git a/website/create_admin.py b/website/create_admin.py
new file mode 100644
index 0000000..3de3c2d
--- /dev/null
+++ b/website/create_admin.py
@@ -0,0 +1,44 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from app import app
+from models import db, User
+from datetime import datetime
+
+def create_admin_user():
+    """Create an admin user in the database."""
+    with app.app_context():
+        try:
+            # Check if admin user already exists
+            admin = User.query.filter_by(username='admin').first()
+            if admin:
+                print("Admin user already exists")
+                return
+            
+            # Create admin user
+            admin = User(
+                username='admin',
+                email='admin@example.com',
+                is_admin=True,
+                created_at=datetime.utcnow()
+            )
+            admin.set_password('admin')
+            
+            # Add and commit
+            db.session.add(admin)
+            db.session.commit()
+            
+            print("Admin user created successfully!")
+            
+            # Verify user was added
+            user = User.query.filter_by(username='admin').first()
+            if user:
+                print(f"Verified: Admin user exists with ID {user.id}")
+            else:
+                print("WARNING: Failed to verify admin user creation")
+                
+        except Exception as e:
+            print(f"Error creating admin user: {e}")
+
+if __name__ == "__main__":
+    create_admin_user() 
\ No newline at end of file
diff --git a/website/database/systades.db b/website/database/systades.db
index ee1415381e380b4d59b03fa2dbfbd6799873312d..eb737e2673689c004f3eae54ed9b953fabf903bc 100644
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diff --git a/website/fix_db.py b/website/fix_db.py
new file mode 100755
index 0000000..9bfbc93
--- /dev/null
+++ b/website/fix_db.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import os
+import sqlite3
+from datetime import datetime
+from app import app, db_path
+from models import db
+
+def ensure_db_dir():
+    """Make sure the database directory exists."""
+    os.makedirs(os.path.dirname(db_path), exist_ok=True)
+
+def fix_database_schema():
+    """Fix the database schema by adding missing columns."""
+    with app.app_context():
+        # Ensure directory exists
+        ensure_db_dir()
+        
+        # Check if database exists, create tables if needed
+        if not os.path.exists(db_path):
+            print("Database doesn't exist. Creating all tables from scratch...")
+            db.create_all()
+            print("Database tables created successfully!")
+            return
+        
+        # Connect to existing database
+        print(f"Connecting to database: {db_path}")
+        conn = sqlite3.connect(db_path)
+        cursor = conn.cursor()
+        
+        # Check if User table exists
+        cursor.execute("SELECT name FROM sqlite_master WHERE type='table' AND name='user'")
+        if not cursor.fetchone():
+            print("User table doesn't exist. Creating all tables from scratch...")
+            conn.close()
+            db.create_all()
+            print("Database tables created successfully!")
+            return
+        
+        # Check existing columns
+        cursor.execute("PRAGMA table_info(user)")
+        columns = cursor.fetchall()
+        column_names = [col[1] for col in columns]
+        print("Existing columns in User table:", column_names)
+        
+        # Add missing columns
+        if 'created_at' not in column_names:
+            print("Adding 'created_at' column to User table...")
+            cursor.execute("ALTER TABLE user ADD COLUMN created_at TIMESTAMP")
+        
+        if 'last_login' not in column_names:
+            print("Adding 'last_login' column to User table...")
+            cursor.execute("ALTER TABLE user ADD COLUMN last_login TIMESTAMP")
+        
+        if 'avatar' not in column_names:
+            print("Adding 'avatar' column to User table...")
+            cursor.execute("ALTER TABLE user ADD COLUMN avatar VARCHAR(200)")
+        
+        if 'bio' not in column_names:
+            print("Adding 'bio' column to User table...")
+            cursor.execute("ALTER TABLE user ADD COLUMN bio TEXT")
+        
+        # Commit the changes
+        conn.commit()
+        conn.close()
+        print("Database schema updated successfully!")
+
+if __name__ == "__main__":
+    fix_database_schema() 
\ No newline at end of file
diff --git a/website/rebuild_db.py b/website/rebuild_db.py
new file mode 100644
index 0000000..159eb08
--- /dev/null
+++ b/website/rebuild_db.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import os
+import sqlite3
+from datetime import datetime
+from app import app, db_path, create_default_categories
+from models import db, User, Category
+
+def rebuild_database():
+    """Completely rebuilds the database by dropping and recreating all tables."""
+    with app.app_context():
+        print(f"Database path: {db_path}")
+        
+        # Back up existing database if it exists
+        if os.path.exists(db_path):
+            backup_path = db_path + '.backup'
+            try:
+                import shutil
+                shutil.copy2(db_path, backup_path)
+                print(f"Backed up existing database to {backup_path}")
+            except Exception as e:
+                print(f"Warning: Could not create backup - {str(e)}")
+        
+        # Ensure directory exists
+        os.makedirs(os.path.dirname(db_path), exist_ok=True)
+        
+        # Drop all tables and recreate them
+        print("Dropping all tables...")
+        db.drop_all()
+        
+        print("Creating all tables...")
+        db.create_all()
+        
+        # Create admin user
+        print("Creating admin user...")
+        admin = User(
+            username='admin',
+            email='admin@example.com',
+            is_admin=True,
+            created_at=datetime.utcnow()
+        )
+        admin.set_password('admin')
+        db.session.add(admin)
+        
+        # Create regular user
+        print("Creating regular user...")
+        user = User(
+            username='user',
+            email='user@example.com',
+            is_admin=False,
+            created_at=datetime.utcnow()
+        )
+        user.set_password('user')
+        db.session.add(user)
+        
+        try:
+            # Commit to generate user IDs
+            db.session.commit()
+            print("Users created successfully!")
+            
+            # Create default categories
+            print("Creating default categories...")
+            create_default_categories()
+            
+            print("Database rebuild completed successfully!")
+        except Exception as e:
+            db.session.rollback()
+            print(f"Error during database rebuild: {str(e)}")
+            raise
+
+if __name__ == "__main__":
+    rebuild_database() 
\ No newline at end of file
diff --git a/website/templates/mindmap.html b/website/templates/mindmap.html
index b1c3982..c06af0f 100644
--- a/website/templates/mindmap.html
+++ b/website/templates/mindmap.html
@@ -577,13 +577,38 @@
     <!-- Mindmap-Container - Jetzt größer -->
     <div class="glass-card overflow-hidden mb-12">
       <div id="mindmap-container" class="relative" style="height: 80vh; min-height: 700px;">
-        <!-- Lade-Overlay -->
-        <div class="mindmap-loading absolute inset-0 flex items-center justify-center z-10" style="background: rgba(14, 18, 32, 0.7); backdrop-filter: blur(5px);">
+        <!-- SVG Filters for node effects -->
+        <svg width="0" height="0" style="position: absolute;">
+          <defs>
+            <!-- Glasmorphismus-Effekt für Knoten -->
+            <filter id="glass-effect" x="-50%" y="-50%" width="200%" height="200%">
+              <feGaussianBlur in="SourceAlpha" stdDeviation="4" result="blur" />
+              <feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 18 -7" result="glow" />
+              <feBlend in="SourceGraphic" in2="glow" mode="normal" />
+            </filter>
+            <!-- Hover-Glow-Effekt -->
+            <filter id="hover-glow" x="-50%" y="-50%" width="200%" height="200%">
+              <feGaussianBlur in="SourceAlpha" stdDeviation="5" result="blur" />
+              <feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0.5  0 1 0 0 0.5  0 0 1 0 1  0 0 0 18 -7" result="glow" />
+              <feBlend in="SourceGraphic" in2="glow" mode="normal" />
+            </filter>
+            <!-- Ausgewählter-Knoten-Glow-Effekt -->
+            <filter id="selected-glow" x="-50%" y="-50%" width="200%" height="200%">
+              <feGaussianBlur in="SourceAlpha" stdDeviation="8" result="blur" />
+              <feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0.7  0 1 0 0 0.2  0 0 1 0 1  0 0 0 18 -7" result="glow" />
+              <feBlend in="SourceGraphic" in2="glow" mode="normal" />
+            </filter>
+          </defs>
+        </svg>
+        
+        <!-- Lade-Overlay mit verbesserter Animation und Transition -->
+        <div class="mindmap-loading absolute inset-0 flex items-center justify-center z-10" style="background: rgba(14, 18, 32, 0.8); backdrop-filter: blur(10px); transition: opacity 0.5s ease-in-out;">
           <div class="text-center">
-            <div class="inline-block animate-spin rounded-full h-12 w-12 border-t-2 border-b-2 border-purple-500 mb-4"></div>
-            <p class="text-white text-lg">Wissenslandschaft wird geladen...</p>
-            <div class="w-64 h-2 bg-gray-700 rounded-full mt-4 overflow-hidden">
-              <div class="loading-progress h-full bg-gradient-to-r from-purple-500 to-blue-500 rounded-full" style="width: 0%"></div>
+            <div class="inline-block animate-spin rounded-full h-16 w-16 border-t-3 border-b-3 border-purple-500 mb-6"></div>
+            <p class="text-white text-xl font-semibold mb-3">Wissenslandschaft wird geladen...</p>
+            <p class="text-gray-300 text-sm mb-4">Daten werden aus der Datenbank abgerufen</p>
+            <div class="w-80 h-3 bg-gray-800 rounded-full mt-2 overflow-hidden">
+              <div class="loading-progress h-full bg-gradient-to-r from-purple-500 via-blue-500 to-purple-500 rounded-full" style="width: 0%; transition: width 0.3s ease-in-out;"></div>
             </div>
           </div>
         </div>
@@ -646,6 +671,33 @@
       </div>
     </div>
   </div>
+  
+  <!-- Modal zum Hinzufügen eines neuen Gedanken -->
+  <div id="add-thought-modal" class="fixed inset-0 bg-black bg-opacity-75 flex items-center justify-center z-50 hidden" style="backdrop-filter: blur(5px);">
+    <div class="glass-card w-full max-w-md p-6">
+      <div class="flex justify-between items-center mb-4">
+        <h3 class="text-xl font-bold text-white">Neuen Gedanken hinzufügen</h3>
+        <button class="text-gray-400 hover:text-white" onclick="document.getElementById('add-thought-modal').classList.add('hidden')">
+          <i class="fas fa-times"></i>
+        </button>
+      </div>
+      <form id="add-thought-form" method="POST">
+        <input type="hidden" id="thought-node-id" name="node_id">
+        <div class="mb-4">
+          <label class="block text-gray-300 mb-2" for="thought-title">Titel</label>
+          <input class="w-full bg-gray-800 text-white border border-gray-700 rounded-lg py-2 px-3" id="thought-title" name="title" placeholder="Titel des Gedankens" required>
+        </div>
+        <div class="mb-4">
+          <label class="block text-gray-300 mb-2" for="thought-content">Inhalt</label>
+          <textarea class="w-full bg-gray-800 text-white border border-gray-700 rounded-lg py-2 px-3 h-32" id="thought-content" name="content" placeholder="Beschreibe deinen Gedanken..." required></textarea>
+        </div>
+        <div class="flex justify-end space-x-3">
+          <button type="button" class="py-2 px-4 bg-gray-700 text-white rounded-lg" onclick="document.getElementById('add-thought-modal').classList.add('hidden')">Abbrechen</button>
+          <button type="submit" class="py-2 px-4 bg-gradient-to-r from-purple-600 to-blue-500 text-white rounded-lg">Speichern</button>
+        </div>
+      </form>
+    </div>
+  </div>
 </div>
 {% endblock %}
 
@@ -653,17 +705,20 @@
 <!-- D3.js Library -->
 <script src="https://d3js.org/d3.v7.min.js"></script>
 
+<!-- Tippy.js für Tooltips -->
+<script src="https://unpkg.com/@popperjs/core@2"></script>
+<script src="https://unpkg.com/tippy.js@6"></script>
+
 <!-- Mindmap scripts -->
-<script src="{{ url_for('static', filename='d3-extensions.js') }}"></script>
-<script src="{{ url_for('static', filename='mindmap.js') }}"></script>
+<script src="{{ url_for('static', filename='js/modules/mindmap.js') }}"></script>
 
 <!-- Initialization Script -->
 <script>
 document.addEventListener('DOMContentLoaded', function() {
-  // Inizialize the mindmap visualization
+  // Mindmap-Container holen
   const mindmapContainer = document.getElementById('mindmap-container');
   
-  // Options for the visualization
+  // Options für die Visualisierung
   const options = {
     width: mindmapContainer.clientWidth,
     height: mindmapContainer.clientHeight,
@@ -675,21 +730,84 @@ document.addEventListener('DOMContentLoaded', function() {
     tooltipEnabled: true,
     onNodeClick: function(node) {
       console.log('Node clicked:', node);
-      // Handle node click - could be expanded to display node content
-      // or fetch more information from the server
+      // Hier könnten wir weitere Informationen zum Knoten anzeigen
+      // oder mehr Daten vom Server abrufen
+      
+      // Beispiel: Gedanken zu diesem Knoten laden
+      fetch(`/api/nodes/${node.id}/thoughts`)
+        .then(response => response.json())
+        .then(data => {
+          console.log('Gedanken zu diesem Knoten:', data);
+          // Hier könnte die Anzeige aktualisiert werden
+        })
+        .catch(error => {
+          console.error('Fehler beim Laden der Gedanken:', error);
+        });
     }
   };
   
-  // Create and initialize the visualization
+  // Ladebalken-Animation starten
+  const progressBar = document.querySelector('.loading-progress');
+  let progress = 0;
+  const loadingInterval = setInterval(() => {
+    progress += 5;
+    if (progress > 100) progress = 100;
+    progressBar.style.width = `${progress}%`;
+    if (progress === 100) {
+      clearInterval(loadingInterval);
+    }
+  }, 150);
+  
+  // Mindmap erstellen und initialisieren
   window.mindmap = new MindMapVisualization('#mindmap-container', options);
   
-  // Set up UI event handlers
+  // API-Aufruf, um echte Daten zu laden
+  fetch('/api/mindmap')
+    .then(response => {
+      if (!response.ok) {
+        throw new Error('Netzwerkantwort war nicht ok');
+      }
+      return response.json();
+    })
+    .then(data => {
+      // Ladebalken auf 100% setzen
+      progressBar.style.width = '100%';
+      
+      // Lade-Overlay nach kurzer Verzögerung ausblenden
+      setTimeout(() => {
+        const loadingOverlay = document.querySelector('.mindmap-loading');
+        if (loadingOverlay) {
+          loadingOverlay.style.opacity = '0';
+          setTimeout(() => {
+            loadingOverlay.style.display = 'none';
+          }, 500);
+        }
+      }, 500);
+      
+      console.log('Mindmap-Daten geladen:', data);
+    })
+    .catch(error => {
+      console.error('Fehler beim Laden der Mindmap-Daten:', error);
+      // Fehlerbehandlung: Zeige trotzdem die Standard-Mindmap
+      progressBar.style.width = '100%';
+      setTimeout(() => {
+        const loadingOverlay = document.querySelector('.mindmap-loading');
+        if (loadingOverlay) {
+          loadingOverlay.style.opacity = '0';
+          setTimeout(() => {
+            loadingOverlay.style.display = 'none';
+          }, 500);
+        }
+      }, 500);
+    });
+  
+  // UI Event-Handler einrichten
   document.getElementById('zoom-in-btn').addEventListener('click', function() {
     if (window.mindmap) {
       const transform = d3.zoomTransform(window.mindmap.svg.node());
       window.mindmap.svg.call(
         d3.zoom().transform,
-        d3.zoomIdentity.scale(transform.k * 1.3)
+        d3.zoomIdentity.translate(transform.x, transform.y).scale(transform.k * 1.3)
       );
     }
   });
@@ -699,7 +817,7 @@ document.addEventListener('DOMContentLoaded', function() {
       const transform = d3.zoomTransform(window.mindmap.svg.node());
       window.mindmap.svg.call(
         d3.zoom().transform,
-        d3.zoomIdentity.scale(transform.k / 1.3)
+        d3.zoomIdentity.translate(transform.x, transform.y).scale(transform.k / 1.3)
       );
     }
   });
@@ -714,14 +832,113 @@ document.addEventListener('DOMContentLoaded', function() {
   });
   
   document.getElementById('add-thought-btn').addEventListener('click', function() {
-    alert('Diese Funktion steht demnächst zur Verfügung.');
+    if (window.mindmap && window.mindmap.selectedNode) {
+      const nodeId = window.mindmap.selectedNode.id;
+      const modal = document.getElementById('add-thought-modal');
+      if (modal) {
+        // Modal öffnen, wenn vorhanden
+        modal.classList.remove('hidden');
+        // Node-ID in ein verstecktes Feld setzen
+        const nodeIdField = document.getElementById('thought-node-id');
+        if (nodeIdField) nodeIdField.value = nodeId;
+      } else {
+        // Simpler Dialog, wenn kein Modal existiert
+        const thoughtText = prompt('Neuen Gedanken eingeben:');
+        if (thoughtText) {
+          // Gedanken über API hinzufügen
+          fetch(`/api/nodes/${nodeId}/thoughts`, {
+            method: 'POST',
+            headers: {
+              'Content-Type': 'application/json',
+            },
+            body: JSON.stringify({
+              title: thoughtText,
+              content: thoughtText
+            })
+          })
+          .then(response => response.json())
+          .then(data => {
+            alert('Gedanke wurde hinzugefügt!');
+            // Optional: Knoten neu laden oder Zähler aktualisieren
+          })
+          .catch(error => {
+            console.error('Fehler beim Hinzufügen des Gedankens:', error);
+            alert('Fehler beim Hinzufügen des Gedankens.');
+          });
+        }
+      }
+    } else {
+      alert('Bitte wähle zuerst einen Knoten aus.');
+    }
   });
   
   document.getElementById('connect-btn').addEventListener('click', function() {
-    alert('Diese Funktion steht demnächst zur Verfügung.');
+    if (window.mindmap && window.mindmap.selectedNode) {
+      alert('Bitte wähle einen weiteren Knoten aus, um eine Verbindung herzustellen.');
+      // Hier könnte ein spezieller Modus aktiviert werden, der auf den nächsten Klick wartet
+      window.mindmap.connectMode = true;
+    } else {
+      alert('Bitte wähle zuerst einen Knoten aus.');
+    }
   });
   
-  // Handle window resize
+  // Formular zum Hinzufügen neuer Gedanken behandeln
+  const thoughtForm = document.getElementById('add-thought-form');
+  if (thoughtForm) {
+    thoughtForm.addEventListener('submit', function(event) {
+      event.preventDefault();
+      
+      const nodeId = document.getElementById('thought-node-id').value;
+      const title = document.getElementById('thought-title').value;
+      const content = document.getElementById('thought-content').value;
+      
+      if (!nodeId || !title || !content) {
+        alert('Bitte fülle alle Felder aus.');
+        return;
+      }
+      
+      // Gedanken über API hinzufügen
+      fetch(`/api/nodes/${nodeId}/thoughts`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          title: title,
+          content: content,
+          branch: 'main' // Default-Zweig
+        })
+      })
+      .then(response => {
+        if (!response.ok) {
+          throw new Error('Fehler beim Hinzufügen des Gedankens');
+        }
+        return response.json();
+      })
+      .then(data => {
+        // Modal schließen
+        document.getElementById('add-thought-modal').classList.add('hidden');
+        
+        // Formular zurücksetzen
+        thoughtForm.reset();
+        
+        // Erfolgsmeldung anzeigen
+        alert('Gedanke wurde erfolgreich hinzugefügt!');
+        
+        // Optional: Knoten in der Mindmap aktualisieren (z.B. Zähler erhöhen)
+        if (window.mindmap && window.mindmap.selectedNode) {
+          window.mindmap.selectedNode.thought_count += 1;
+          window.mindmap.updateNodeLabels();
+        }
+      })
+      .catch(error => {
+        console.error('Fehler beim Speichern des Gedankens:', error);
+        alert('Fehler beim Speichern des Gedankens. Bitte versuche es erneut.');
+      });
+    });
+  }
+  
+  // Fenstergrößen-Änderung behandeln
   let resizeTimeout;
   window.addEventListener('resize', function() {
     clearTimeout(resizeTimeout);
@@ -730,16 +947,16 @@ document.addEventListener('DOMContentLoaded', function() {
         window.mindmap.width = mindmapContainer.clientWidth;
         window.mindmap.height = mindmapContainer.clientHeight;
         window.mindmap.svg
-          .attr('width', window.mindmap.width)
+          .attr('width', '100%')
           .attr('height', window.mindmap.height)
           .attr('viewBox', `0 0 ${window.mindmap.width} ${window.mindmap.height}`);
           
-        // Update the center force
+        // Mittelpunkt-Kraft aktualisieren
         window.mindmap.simulation.force('center', 
           d3.forceCenter(window.mindmap.width / 2, window.mindmap.height / 2)
         );
         
-        // Restart the simulation
+        // Simulation neu starten
         window.mindmap.simulation.alpha(0.3).restart();
       }
     }, 250);
diff --git a/website/test_db.py b/website/test_db.py
new file mode 100644
index 0000000..683f354
--- /dev/null
+++ b/website/test_db.py
@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from app import app
+from models import db, User
+
+def test_user_query():
+    """Test if we can query the user table."""
+    with app.app_context():
+        try:
+            # Try to query all users
+            users = User.query.all()
+            print(f"Found {len(users)} users")
+            
+            for user in users:
+                print(f"User: {user.username}, Email: {user.email}")
+                
+            # Try to query by username - this is where the error happens
+            user = User.query.filter_by(username='admin').first()
+            if user:
+                print(f"Found admin user: {user.username}")
+            else:
+                print("Admin user not found")
+                
+            print("All queries completed successfully!")
+        except Exception as e:
+            print(f"Error: {e}")
+
+if __name__ == "__main__":
+    test_user_query() 
\ No newline at end of file